Place of Origin:Guangdong, China
Material Introduction:
Primarily manufactured from recrystallized silicon carbide (RSiC). Reaction-bonded silicon carbide (RBSiC) or pressureless-sintered silicon carbide (SSiC) may also be evaluated according to the operating temperature, furnace atmosphere, and structural requirements.
Functional Features:
This SiC heating element offers a fast thermal response and stable heat output in high-temperature environments. Resistance, diameter, overall length, hot-zone length, cold-end length, and terminal structure can be adjusted to match the furnace design and power supply.
Application Industries:
Suitable for high-temperature industrial furnaces, including shuttle and tunnel kilns, heat-treatment equipment for diffusion, oxidation, and annealing, glass and ceramic melting, non-ferrous metal processing, radiant-tube heating systems, laboratory muffle furnaces, and electronic component sintering equipment.
Global OEM Supply:
Serving OEM customers in the USA, Germany, Japan, and Europe.
Lead Time:
Standard rod/U-shape elements: 20-35 days, Customized high-precision/radiant tube structures: 45-70 days
This silicon carbide heating element is manufactured from high-purity silicon carbide (SiC) for industrial electric furnaces, ceramic kilns, glass-processing furnaces, heat-treatment equipment, and electronic-component sintering systems. By converting electrical resistance into heat, it provides a stable high-temperature source for continuous or cyclic furnace operation. It helps reduce the oxidation, softening, and frequent replacement often associated with metallic heating elements under sustained high-temperature conditions.
The element is primarily manufactured from recrystallized silicon carbide (RSiC) , which forms a crystalline SiC structure suitable for high-temperature resistance heating.
Depending on the operating temperature, furnace atmosphere, mechanical requirements, and element design, the following materials may also be evaluated:
The final material system should be selected according to the required resistance, furnace construction, power supply, and actual operating conditions.
This silicon carbide furnace heating element is designed for equipment that requires a stable and durable high-temperature heat source.
Silicon carbide maintains good structural stability at elevated temperatures, making the element suitable for industrial furnaces operating continuously or in repeated heating cycles.
An appropriate surface load allows the SiC heating element to deliver concentrated heat and helps shorten furnace heat-up time.
The material’s relatively high emissivity supports efficient radiant heat transfer from the element to the workpieces inside the furnace.
Good thermal-shock resistance makes the element suitable for equipment that undergoes repeated start-up, heating, cooling, and shutdown cycles.
CERAMPRO can develop custom ceramic heating elements according to the customer’s furnace construction and electrical requirements.
The values below are reference data for a representative RSiC heating element. Actual specifications may vary with the material grade, element dimensions, furnace atmosphere, operating temperature, and test method.
| Parameter | Reference Specification | Remarks |
|---|---|---|
| Reference Maximum Operating Temperature | 1450–1550°C | Reference range for continuous operation in air |
| Primary Material | High-purity silicon carbide (SiC) | Crystalline ceramic material for high-temperature resistance heating |
| Reference Surface Load | 3–15 W/cm² | Adjusted according to furnace temperature, atmosphere, and heat-dissipation conditions |
| Specific Resistance | 0.1–0.2 Ω·cm | Reference value measured at 1050°C |
| Flexural Strength | ≥15 MPa | Depends on the material structure and porosity |
| Reference Porosity | 25%–30% | Reference range for a representative RSiC structure |
| Thermal Conductivity | 20–30 W/(m·K) | Affected by material grade, density, and temperature |
| Total Emissivity | 0.80–0.90 | Supports radiant heat transfer at high temperature |
| Resistance Tolerance | ±10% | Standard manufacturing reference tolerance |
The maximum element surface temperature is not the same as the furnace’s continuous operating temperature. The permissible operating temperature also depends on the furnace atmosphere, surface load, element spacing, control method, and element dimensions.
| Material | Structure | Main Characteristics | Selection Guidance |
|---|---|---|---|
| RSiC | Recrystallized porous structure | Suitable for high-temperature resistance heating with good thermal-shock performance | A common choice for industrial SiC heating elements |
| RBSiC | Reaction-bonded, relatively dense structure | Good mechanical strength and oxidation resistance | Electrical resistance must be evaluated before use as a heating element |
| SSiC | Pressureless-sintered, high-density structure | Good wear resistance, corrosion resistance, and structural strength | More commonly used for structural parts; heating applications require separate evaluation |
| Metal Heating Alloy | Metal wire or strip | Established installation methods and convenient control at moderate temperatures | May oxidize, creep, or deform during prolonged high-temperature operation |
| Molybdenum Disilicide | Dense resistance-heating material | Suitable for higher temperature ranges | Usually involves higher cost, greater brittleness, and more demanding control conditions |
No. This product is a furnace heating element installed inside the furnace. It normally does not include the power supply, temperature controller, transformer, furnace lining, wiring assembly, or complete furnace.
Please provide the furnace type, operating temperature, atmosphere, supply voltage, power, resistance, overall length, diameter, hot zone, cold ends, installation method, and estimated quantity. Replacement projects should also include photographs, terminal details, drawings, or an existing sample.
Not based on the material value alone. The actual operating limit also depends on the furnace atmosphere, surface load, element spacing, control method, dimensions, and installation conditions.
A silicon carbide heater gradually oxidizes during high-temperature operation. Changes in the material structure and conductive paths can increase resistance over time. Proper surface loading and atmosphere control help slow this process.
Straight, U-shaped, W-shaped, and multi-leg SiC heating elements can be evaluated for horizontal or vertical installation. Length, diameter, support position, operating temperature, and resistance distribution must be considered together.
Inspection may include dimensions, appearance, room-temperature resistance, resistance tolerance, terminal structure, and connection integrity. Special test items and test temperatures should be agreed upon before production.
Direct mixing is generally not recommended. Used elements normally have higher resistance than new elements, which may result in uneven current and heat distribution. Elements should be grouped according to measured resistance, wiring arrangement, and power-supply configuration.
